Marathon 8x1.75" Semi-Pneumatic Tire on Wheel with Centered Hub 8x1.75" Tire. 8" Tire Diameter. 1.75" Tire Width. Semi-Pneumatic Tire made of rubber. Ribbed Tread. No flats! 1.375" Centered Hub. 1/2" Ball Bearings. Multi-purpose replacement tire. 225 lb load capacity. Not for highway use.